campus, with 81.4% coming from the government, 12.1% from foundations, 5.5% from industry, and 1.0% from private and other. An additional $120 million in sponsored research was for the Plasma Physics Lab; the main campus and the lab combined totaled to $370 million for sponsored research. Based on 2017 data, the university ranked 72nd among 902 institutions for research expenditures.
Based on 2018 data, Princeton's National Academy Membership totaled to 126, ranking 9th in the nation. The university hosts 75 research institutes and centers and two national laboratories. Princeton is a member of the New Jersey Space Grant Consortium.
==== Library system ====
The Princeton University Library system houses over 13 million holdings through 11 buildings, including seven million bound volumes, making it one of the largest university libraries in the United States. Built in 1948, the main campus library is Firestone Library and serves as the main repository for the humanities and social sciences. Its collections include …
